You can start playing Battlefield 1 right now if you have EA Access

The Battlefield 1 EA Access Play First Trial is live and all subscribers are free to start battling like it's 1914 through 1918. The 10-hour Play First trial includes access to five multiplayer maps, four modes, and two chapters of the single-player campaign ahead of Battlefield 1's release date. All of your progress will carry over if you decide to buy the full game once it comes out. The same goes for Origin Access if you're the PC gaming type.

You can also grab the Battlefield 1 Early Enlister edition to get a few days' head start on the full game. Here's a quick calendar from EA to lay it all out for you (release dates used to be so much simpler):